Re: simple question about cluster size increase

Yes you can join additional nodes to existing cluster using Cloudera Manager. Its a simple process of distributing the parcels and agents to new nodes and activating roles as needed. You can enter the process by selecting Hosts -> All Hosts, then Add new hosts to cluster.

Re: simple question about cluster size increase

Yes, you can add extra nodes to the cluster even though you have used the non-production installation path. The difference between the two installation paths is the database backing the services. The non-prod version uses an embedded database, while the prod version relies on a stand alone database such as MySql.